Attenuation of Zero Sound in a Normal Fermi Liquid

Abstract

The attenuation of zero sound in the collisionless regime ($\ensuremath{\omega}\ensuremath{\tau}\ensuremath{\gg}1$) is calculated using perturbation theory to treat the effects of collisions. Detailed calculations are performed taking into account Landau parameters with $l\ensuremath{\le}2$; the results are applied to the experimental data for liquid ${\mathrm{He}}^{3}$.